@mixin transition($transition) {

  -webkit-transition: $transition;
  -moz-transition: $transition;
  transition: $transition;
}

@mixin transform($transform) {
  -webkit-transform: $transform;
  -moz-transform: $transform;
  -ms-transform: $transform;
  transform: $transform;
}

@mixin perspective($perspective) {
  -webkit-perspective: $perspective;
  -moz-perspective: $perspective;
  perspective: $perspective;
}

@mixin transform-style($transform-style) {
  -webkit-transform-style: $transform-style;
  -moz-transform-style: $transform-style;
  transform-style: $transform-style;
}

@mixin box-shadow($shadow) {
  -webkit-box-shadow: $shadow;
  -moz-box-shadow: $shadow;
  box-shadow: $shadow;
}